HTML Reporter: Update fuzzysort.js to 1.2.1

Reviewed package diff via
<https://diff.intrinsic.com/fuzzysort/1.1.4/1.2.1>.

The main reason for updating is to bring in my upstream fix
(ref farzher/fuzzysort#72, and
ref farzher/fuzzysort#93) to not depend
on ES6 Map being globally defined.

This unblocks the next commit, which is removing the hack for loading
es6-map.js in an unusual way. That unusual way actually caused both
our own use in test.js and fuzzysort.js to *not* see the native Map
anymore in supporting environents, which I'll fix as well.

Also, since this is a dependency that we bundle as part of the
distribution, pin its version exactly, as we do with `kleur`.

package.json

@@ -61,7 +61,7 @@
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-qunit": "^6.2.0",
     "fixturify": "^2.1.1",
-    "fuzzysort": "^1.1.4",
+    "fuzzysort": "1.2.1",
     "grunt": "^1.4.1",
     "grunt-contrib-connect": "^3.0.0",
     "grunt-contrib-copy": "^1.0.0",